Tom, This can be addressed in a number of ways. The configuration options include setting for burst durations within both the AU and SUs for both high (voice) and low priority traffic (data) and there is a specific "starvation prevention" setting in 4.0. Also, those that implement DRAP via the optional Alvarion voice gateways (sold widely in Europe and other places, but not yet sold much in the U.S.) have the ability to limit the number of calls per SU and per sector. When the calls exceed the settings, then the caller receives a busy signal when they try to dial versus opening a call session that was choppy. So the DRAP call admission settings would be adjusted per client based on what you sold to them -- that guy could not sneak 40 calls across his CPE because you'd have set him a cap based on his service plan.
For full details you should read the short (19 page) VoIP over Wireless Networks whitepaper I sent out some months ago. I can send you another copy if you need it. Patrick Leary AVP WISP Markets Alvarion, Inc. o: 650.314.2628 c: 760.580.0080 Vonage: 650.641.1243 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom DeReggi Sent: Saturday, January 06, 2007 5:55 PM To: WISPA General List Subject: Re: [WISPA] churn,double play and why WLP is key - I finally understand it Patrick, >I'm talking about ALL >the CPE on a sector being able to send its que'd voice out before any >CPE can release data into the sector? Thats pretty cool. But I'd be interested in learning more on how that protocol method interacts with bandwidth allocation per subscriber. This is the problem that I see from the provider point of view. They have two profiles of subscribers, the ones that use their bandwdith, and the ones that don't. The ones that don't can be oversubscribed heavilly, therefore can be sold to at a much lower cost to compete agaisnt commodity cable and DSL competitors. The ones that do, monompolize the network, and need to be sold to at a higher price, often designated at a business class CIR type service, or however else the ISP tends to market the hgiher QOS guarantee service. When the ISP qualifies the prospect appropriately in advance correctly, everyone wins. The ISP gets paid, The High QOS client gets the priority he needs, and the low cost client does not get starved of broadband. The problem occurs when the ISP does not qualify the prospect appropriately. We've learned that every client starts their conversation out, "I barely use bandwidth. I just need a very low cost service like ADSL for $49. I'm just doing VOIP, basic Internet use, and creating a VPN between my offices for a central file server. Maybe some occassional video conferencing. But nothing demanding." Or they lie, and say they have one computer just doing limited internet browsing, and you learn they are hosting about 20 web servers and a search engine, or a Bulk Email service. Or if I make it relevent to this thread, they end up putting 20-30 VOIP phones on the service, that they say is just a limited web browsing service. The truth is Managed VOIP is the big bnadwdith hog today. So globally Giving VOIP users first priority over all other traffic could be a big flaw. It would allow the one that misrepresented their need to chew up all the good honest customer's bandwdith. Meaning if VOIP had first priority above all data traffic, the Client paying $49 a month and inappropriately putting 30 VOIP calls on the service, would have better service than the other 20 customers paying $200/month for data services that bought the appropriate bandwidth for their need. So their is a catch 22 on Prioritizing VOIP above all. So the question is... Does Alvarion do anything smart about this, to deliver a fair amount of bandwidth to ALL subs, when prioritizing VOIP? Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Patrick Leary" <[EMAIL PROTECTED]> To: "WISPA General List" <[email protected]> Sent: Friday, January 05, 2007 11:58 PM Subject: RE: [WISPA] churn,double play and why WLP is key - I finally understand it I don't think so Gino, but I'm open to be proven wrong. Tell me who else can actually prioritize over the air sector wide. I'm talking about not just pushing out the voice first on any given CPE, I'm talking about ALL the CPE on a sector being able to send its que'd voice out before any CPE can release data into the sector? Patrick Leary AVP WISP Markets Alvarion, Inc. o: 650.314.2628 c: 760.580.0080 Vonage: 650.641.1243 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gino A. Villarini Sent: Friday, January 05, 2007 2:19 PM To: 'WISPA General List' Subject: RE: [WISPA] churn,double play and why WLP is key - I finally understand it Patrick, not to rain on you parade but you guys area actually 2nd on this RF prioritization feature.... Gino A. Villarini [EMAIL PROTECTED] Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Patrick Leary Sent: Friday, January 05, 2007 4:13 PM To: WISPA General List Subject: [WISPA] churn,double play and why WLP is key - I finally understand it ...So I'm here at our annual national meeting and our project manager is explaining the Wireless Link Prioritization feature available for BreezeACCESS VL. Frankly, it has always seemed esoteric to those of us non-technical types, but now I got and it is simple enough. First, I learned the statistical improvement in churn when a provider has double play VoIP + data customers. We have had a few CLECs report to us that with a single play model their churn is about 9%. Adding double play takes it down to close to 1%. This is critical to the business model because they said a 10% reduction in churn translates into about a 20% improvement in NPV per subscriber. That's obviously huge. So what's the WLP feature available in BreezeACCESS VL have to do with any of this? BreezeACCESS VL can already do QoS priority tagging of packets per CPE using layer 2 (802.11p), layer 3 (IP TOS, DSCP) or layer 4 (TCP/UDP port ranges common with Cisco, for example). That's good and already better than most brands of BWA gear. BUT, that's only PER CPE. In a typical situation, this does not help at all when multiple CPE are on a sector -- there is no prioritization at the RF level in unlicensed from any brand...until now. WLP (also called multimedia application prioritization) actually solves this and enables over-the-air prioritization for the first time in the industry. The translation for this is that BreezeACCESS VL can now deliver massive VoIP, up to 288 concurrent calls per sector with a MOS (mean opinion score - a rating of voice quality) of 4.1. That's a phenomenal quantity that is more than 10x our main competitor as spelled out in their own relevant VoIP document. So why not just use VL with firmware version 4.0 without getting the WLP feature? The WLP is the key to get the quantity AND THE QUALITY of service since it reserves air priority for the VoIP. So, in a double play business model, it is essential to get MOS voice quality of at least 4.1 and even 4.33 you must implement the WLP. I believe it can now be said without reservation, that if you are using unlicensed and wanting to implement a double play of VoIP + data, the ONLY product out there that can do it in scale and with toll quality is BreezeACCESS VL. Regards, Patrick Leary AVP WISP Markets Alvarion, Inc. o: 650.314.2628 c: 760.580.0080 Vonage: 650.641.1243 [EMAIL PROTECTED] ************************************************************************ **** ******** This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************ **** ******** -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ ************************************************************************ ************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses(190). ************************************************************************ ************ ************************************************************************ ************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses(43). ************************************************************************ ************ ************************************************************************ ************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************ ************ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ ************************************************************************ ************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses(190). ************************************************************************ ************ ************************************************************************ ************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses(43). ************************************************************************ ************ ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
